Salt spray test standard and determination of test results

Standards are uniform rules for repetitive things and summaries. The salt spray test standard specifies the salt spray test conditions, such as temperature, humidity, sodium chloride solution concentration and pH value, and also sets technical requirements for the performance of the salt spray test chamber. The salt spray test standard for the same product is selected according to the characteristics of the salt spray test, the corrosion rate of the metal, and the sensitivity to salt spray. The following describes several salt spray test standards, such as GB/T2423.17-1993 "Basic environmental test procedures for electrical and electronic products test Ka: salt spray test method", GB/T2423.18-2000 "Electrical and electronic products environmental test part 2 : Test test Kb: salt spray, alternating (sodium chloride solution), GB5938-86 "corrosion resistance test method for metal plating and chemical treatment layer of light industrial products", GB/T1771-91 "color paint and varnish resistant Determination of salt spray performance.
The purpose of the salt spray test is to assess the salt spray corrosion quality of products or metal materials. The salt spray test results are judged on the quality of the product. The judgment result is correct and reasonable. It is a correct measure of the product or metal salt spray resistance. The key to corrosion quality. The methods for determining the salt spray test results include: rating determination method, weighing determination method, corrosion occurrence determination method, and corrosion data statistical analysis method. The rating judgment method divides the percentage of the ratio of the corrosion area to the total area into several levels according to a certain method, and uses one level as the basis for the qualification judgment. It is suitable for the evaluation of the flat sample; the weighing determination method is adopted before and after the corrosion test. The weight of the sample is weighed, and the weight of the corrosion loss is calculated to judge the corrosion resistance quality of the sample. It is especially suitable for assessing the corrosion resistance of a certain metal; the determination method of corrosion occurrence is a qualitative judgment. The method determines the sample after the salt spray corrosion test, and the sample is judged by the corrosion phenomenon. Most of the general product standards use this method; the statistical analysis method of the corrosion data provides a confidence in designing the corrosion test, analyzing the corrosion data, and determining the corrosion data. Degree method, which is mainly used to analyze and count the corrosion situation, rather than the quality judgment of a specific product.

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